Tubular door-lock.



w. T. SM

' TUBULAR D00 K.

APPLICATION FILED SEPT. 5, 1912.

1,072,668 Patented 9, 1913.

WJINESSES rney.

COLUMBIA PLANODRAI) CY W. T. SMITH.

TUBULAR DOOR LOCK. APPLIGATION FILED SBPT.5,1`912.

Patented Sept. 9, 1913.

2 SHEETS-SHEET 2.

Ha @J Afl y /NVENTo/e,

WITNESSES COLUMBM PLANOGRAPH co..wAsHxNG1'oN. D. c.

UNTTED sTATEs PATENT ormoni.

l WILLIAM T. SMITH, F BELLEFONTAINE, OHIO, ASSIGNOR OF ONEeHALF TO`G-EORGE w. SMITH, OFMBELLEFONTAINE, oHIo.

TUBULAR DOOR-LOCK.

l'citizen of theUnited States', residing at Bellefontaine, inthe county of Logan,.State of Ohio, have-invented certain newand vuse-V ful Improvements 1n Tubular Door-Locks,

of which the following is a specification.

This inventionV relates to` doork locks," for; inner as'vwell as for "front doors, andone object of' thefinventionjresides in the" p'e' culiar shape and construction of the tumbler which inakesthe lockfvery' safe 4and almost impossible `to,p -ick.v l Y y Another objectof vthe invention is to'pro-v vide a lock of very simple construction and easyftoassemble and put inplace in the door; little other work being required than boring holes, Vwhile anotherobject is to make `the llock reversible, that isany lock can be used,y left or right handed'byf merely reversing the bars. E y Y "In the drawings :one embodiment of the invention has beeny shown in thefdilerent figures 'and Figure 1 represents a vertical section of the lock inserted in a door, lwith some parts in elevation. Fig. 2 isa section on line 2-2 of Fig.v l; Fig. 3 is a side elevation seen fromthe inside of the door, showing the bar lock arrangement; Fig. 4 is a section on the line 4-4 of Fig. 3; F ig.` 5 is a section on the line- 5 5 of F ig. 3;y Fig. 6'is a top plan view of the bolt; Fig. 7 a similar view to Fig. 6 with the tumbler shown in place; Fig. 8 is a side elevation ofthe knob bar partly in section and with the bearing sleeve for the bar; Fig. 9 is a top Lplan view of Fig. 8 partly-in. section; Fig. l0 is a vertical section of the door Lon the line 10-10 of Fig.1; Fig. 11 is a front view of the lock in position in the door and F ig..l2 is a detail view of the tumbler.

In the drawings, A is the dead bolt, whichV is preferably made from a cylindrical steel bar,with a vertical slot '2O in the middle thereof. On the upper side of. the bolt are cut two narrow notches 21 and 22which are intended to engage with corresponding lugs 23y on the tumblery B. On the under side of the bolt is provided another notch y24 for engagement with the key and a recess25 at theV rear end serves as a guide-way for the tumbler spring and as a seatfor vitsholding block 54. 4 l

The housing C of the lock'comprises two tubular inward extensions 26 and 27, the

Specification of Letters Patent.

Patented sept. 9, Tais.v

Application led September 5, 1912. ASerial No. 718,692.

vane cr keyy plate 30 which extendsacross a "longitudinal openingf32 for the tumblerin t-hebottom `of the tube 26. One or more `wardsl 130b areprovided oneach sideV of the keyzholel 30 in the key plate. `Above the; t

` tube 26 the other tube 27 is wise extending inward from ,the yface plate V33 "of thehousing; This latter tube 2'? of the :housing C is intended as a bearing for the latch bolt D, and provided with a Vwide cut 34 von one side. 3,5 operates,` as will be described further.` The tube 27 is closed atits rear end by a bottom plate 36 which servesl as an abutment for a compression spring 37, which with its other end impinges the rear of t-he latch bolt D, always pushing it outward, so that the beveled pointf38 ofthe bar protrudes beyond the face plate. The :latch bolt D is retained in4 t-he housing byl a screw 39 adapted to run-ina slotk40, in the tube 27. Thelatch boltDis 'provided with arecess 4lV on each situated and like- In this cut 34^the roll back side, land the rear side of these recesses are r, i

`rounded to form suitable bearing surfaces `for the knob finger 35,' or else a stud 42Yniay be placed on each side for the same purpose.

Thev object of having two of these recesses .l

merely turning the latch bolt around `180O on its axis. For this purposey a screwghole on each side of the latch bolt has also been provided for the screw 39. f

The usual square section y spindle 43 for the knobs or handles 44 is situated beneath the latch-bolt D and ynear its middle, the roll back 35 is mounted around this knob spindle 43. I The roll back 35 has an adjusting screw 45, by means of whichthe linger of the roll back can be adjusted sidewise on the spindlel The upward projecting part of this roll back operates in the slot 34 ofthe tube 27 and imf pingeswiththe stud 42 or the rounded rear face yof the recess 4l on oneside of the latch bolt D.

The inside locking device for the latch` bolt consists of adisk 46 keyed on the vknob from the outside of the door into the key hole 53. As will be readily understood the knob handles will then be prevented from turning and from revolving the roll back 35,' so that unless the key 52 first unlocks the lever 49 the door cannot be opened from the f outside.` This feature of the invention is particularly intended for use in guest rooms in hotels. Y

As already described the tumbler B is Secured in the lower tube 26 by means f/of screws 29 which are threaded in the holding-block 54 which tits in the recess 25 ot the dead bolt A with sutlicient clearance on all sides. verse slit into which is inserted a spring 55,` and the screws29 also serve to retain said .spring in the holding-block. At the free end of the spring 55 is secured an inverted T-piece, with its T projections 56 in the axial direction of the bolt. At the upper end of the T-piece are provided two transverse studs 23 which are adapted to engage with one pair or the other of the notches 21, 22 in the bolt A, lwhereby the bolt will be retained by said studs 23 in either one of its two positions.k

Supposing now that a door, Qprovided with vthis lock, has been shut and locked with the dead bolt A, and that also the inside locking device is in action, the following operations will be required to open the door: The key for Vthe bolt is first inserted into the key hole 38 and turnedin the usual manner, when it will rst raise the tumbler B when impinging with the lower face thereof. The dead bolt A will thereby be released from engagement with the studs 23 of the tumbler so that by a continued turning of the key, the Adead bolt will. be withdrawn when the key enters the notch 24. lVhile stillcontinuing to turn the key, it will permit the tumbler to be lowered by its spring 55 when the studs 23 willV enter the other pair of the notches 21 in the dead bolt A, thereby securely holding it in its withdrawn position. The key 52 is now inserted in the key hole 53 and turned until the lever 49 disengages the disk 46, where-l upon the handle will be tree to turn the roll back 35 and draw back the latch bolt D. It

` will be evident that, by simply swinging the lever 49 intoengagement with the disk 46 on the knob-spindle, the lock is converted into a self closing spring lock, working independent of the knob-spindle 43;

The holding block has a transv and by disengaging the lever, the knobspindle Ymay be turned freely from either side;

Iclaim:

i l. A tubular door lock having a housing with a'tubular extension a ke late suspended from said tubular extension, a plural-ity ot wards in said key plate.

2. A..--tubular doorl lock having a cylindricalh locking member; a housing comprising a face plate and tubular inward exten- Lsion thereon, forming a kbearing for said member and having a central key plate suspended from said extension; and a plurality of wards in' said key plate.

3. A tubularjdoor lock having a housing with tubular extensions, one of said tubular extensions being rprovided with a central vlongitudinal slot on its under side, a keyY plate suspendedA fromsaid. tubular extension bridging said longitudinal slot 4.1 A tubular door lock having a housing with tubular extensions, one of said tubularextensions being provided with a central :longitudinal slot on its under side, a key plate suspended from said tubular extension bridging said longitudinal slot, and a plurality of wards in said key'plate.

5. A tubulardoor-lock having a housing,

a't-ubular extension in said housing, a keyV "plate suspended'from said tubular extension, a cylindrical dead bolt mounted to slide in said'tubular extension, v'a central longitudinal slot in said bolt and a tumbler operating with-one end in said slot and with itsy other end rigidly secured in said housing, said tumbler being constructed t0 'hold the 'bolt in diiierent vpositions and 'normally impinging with said key plate.

6. A tubular door lock having a housing, a tubular extension in said housing, a cylindrical Adead bolt mounted to slide in said tubular extension, a central longitudinal Vslot in said bolt and a tumbler constructed to hold the bolt in diierent positions; said tumbler comprising a holding block securely fastened in said housing a spring extending from said holding block andan inverted T-piece at the free end of the spring operating in said central slot, its horizontal arms extending in the longitudinal direction of said plate, said T-piece having transverse projections and a plurality ofnotches 1n said plate for engaging with said' projections whereby the bolt is rigidly held in a plurality of different positions by said tumbler.v Y

7. A tubular door-lock .having a housing, a tubular extension in saidhousing, la key plate suspended from said housing, a cylindrical dead, bolt mounted to slide in said tubular extension, a central longitudinal slot in said bolt and a tumbler at one end securely fastened in said tubular extension and constructed to hold the bolt in differpiece normally contacting with said key The foregoing specification signed-*at Washington, D. C., this fourth day of Sep- 10 tember, 1912. -V

ent positions; a shoe-piece on said tumbler operatlng 1n said centralv slot; said shoeplate and being adapted to impinge with the key so as to raise the tumbler from said key plate upon turning the key whereby {,)h tumbler Will be disengaged from said WILLIAM T. SMITH.

In presence ofv tWo Witnesses:

HERVEY S. KNIGHT, BENNETT S. JONES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. l 

